[spacedcowboy]

I've never heard of SOLID before today. I'm a senior engineer at a FAANG company - about as senior as you get, actually. I've designed operating systems for novel hardware, implemented kernel extensions, written device-drivers for hardware that doesn't even exist at the time, and debugged the same. I've changed shipping applications to run literally orders of magnitude faster by adopting new technologies, and I've written code in daily active use on hundreds of millions of devices today. I tend to be given exactly the multi-functional cross-team "difficult" system-design problems that you're talking about.

I know of the KISS and DRY principles - I think they're widespread, I've just gone and looked up SOLID and it seems like "sensible object-oriented design", but it's not an acronym I've ever come across in the last 30-odd years of professional software development. I don't think it's in the same category as the first two.